CVE-2026-40034

Description

gix-submodule before 0.29.0 (gitoxide before 0.5.21, gix before 0.84.0) incorrectly validates the update field in .gitmodules, allowing attackers to bypass the CommandForbiddenInModulesConfiguration guard when a submodule has been initialized with only partial configuration in .git/config. An attacker can inject arbitrary shell commands via the update field in .gitmodules that will be executed when Submodule::update() is called on a previously-initialized submodule, enabling remote code execution.

Source: NVD

References

• [NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-40034
• [Other]https://github.com/GitoxideLabs/gitoxide/commit/6a2e6a436f76c8bbf2487f9967413a51356667a0
• [Other]https://github.com/GitoxideLabs/gitoxide/commit/dd5c18d9e526e8de462fa40aa047acd097cfa7dc
• [Other]https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-f26g-jm89-4g65
• [Other]https://red.anthropic.com/2026/cvd/findings/ANT-2026-6SNS6KMP
• [Other]https://www.vulncheck.com/advisories/gitoxide-command-injection-via-partial-gitmodules-override-in-gix-submodule
• [Other]https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-f26g-jm89-4g65

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